Java 如何从我的服务层内部创建cookie并添加到http响应？

我正在spring mvc应用程序中创建自定义身份验证服务：

@Service
public class AuthenticationServiceImpl implements AuthenticationService {

   @Autowired
   UserService userService;

   @Override
   public void login(String email, String password) {

      boolean isValid = userService.isValidLogin(email, password);

      if(isValid) {
          // ??? create a session cookie and add to http response
      }

   }

}

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如何创建cookie并将其添加到响应中？

要添加新cookie，请使用。基本上是一个键值对，在构造时将名称和值作为字符串。

在Spring MVC中，默认情况下，您将获得htppServletResponse对象

   @RequestMapping("/myPath.htm")
    public ModelAndView add(HttpServletRequest request,
         HttpServletResponse response) throws Exception{
            //Do service call passing the response
    return new ModelAndView("CustomerAddView");
    }

//Service code
Cookie myCookie =
  new Cookie("name", "val");
  response.addCookie(myCookie);

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以下是@Aravind的回答，并提供了更多细节

@RequestMapping("/myPath.htm")
public ModelAndView add(HttpServletRequest request, HttpServletResponse response) throws Exception{
    myServiceMethodSettingCookie(request, response);        //Do service call passing the response
    return new ModelAndView("CustomerAddView");
}

// service method
void myServiceMethodSettingCookie(HttpServletRequest request, HttpServletResponse response){
    final String cookieName = "my_cool_cookie";
    final String cookieValue = "my cool value here !";  // you could assign it some encoded value
    final Boolean useSecureCookie = false;
    final int expiryTime = 60 * 60 * 24;  // 24h in seconds
    final String cookiePath = "/";

    Cookie cookie = new Cookie(cookieName, cookieValue);

    cookie.setSecure(useSecureCookie);  // determines whether the cookie should only be sent using a secure protocol, such as HTTPS or SSL

    cookie.setMaxAge(expiryTime);  // A negative value means that the cookie is not stored persistently and will be deleted when the Web browser exits. A zero value causes the cookie to be deleted.

    cookie.setPath(cookiePath);  // The cookie is visible to all the pages in the directory you specify, and all the pages in that directory's subdirectories

    response.addCookie(cookie);
}

相关文件：

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cookie是一个具有键值对的对象，用于存储与客户相关的信息。主要目标是个性化客户体验

可以创建一个实用方法，如下所示

private Cookie createCookie(String cookieName, String cookieValue) {
    Cookie cookie = new Cookie(cookieName, cookieValue);
    cookie.setPath("/");
    cookie.setMaxAge(MAX_AGE_SECONDS);
    cookie.setHttpOnly(true);
    cookie.setSecure(true);
    return cookie;
}

如果存储重要信息，那么我们也应该将setHttpOnly设置为不能通过javascript访问/修改cookie。如果您希望仅通过https协议访问Cookie，则SetSecurity适用

使用上述实用程序方法，您可以将cookie添加到响应中，如下所示：

Cookie cookie = createCookie("name","value");
response.addCookie(cookie);

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顺便说一句，我不建议您这样做来创建自己的身份验证方案。